./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd317ac0ecdb37853dacea373914a521115465e0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 17:21:10,680 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 17:21:10,682 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 17:21:10,689 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 17:21:10,689 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 17:21:10,690 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 17:21:10,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 17:21:10,692 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 17:21:10,693 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 17:21:10,693 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 17:21:10,694 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 17:21:10,694 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 17:21:10,695 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 17:21:10,696 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 17:21:10,697 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 17:21:10,697 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 17:21:10,698 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 17:21:10,699 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 17:21:10,700 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 17:21:10,701 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 17:21:10,702 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 17:21:10,703 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 17:21:10,704 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 17:21:10,705 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 17:21:10,705 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 17:21:10,705 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 17:21:10,706 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 17:21:10,707 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 17:21:10,707 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 17:21:10,708 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 17:21:10,708 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 17:21:10,708 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 17:21:10,708 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 17:21:10,708 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 17:21:10,709 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 17:21:10,710 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 17:21:10,710 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 17:21:10,717 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 17:21:10,718 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 17:21:10,718 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 17:21:10,718 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 17:21:10,719 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 17:21:10,719 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 17:21:10,719 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 17:21:10,719 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 17:21:10,720 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 17:21:10,721 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 17:21:10,721 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 17:21:10,721 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-12-08 17:21:10,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 17:21:10,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 17:21:10,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 17:21:10,748 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 17:21:10,748 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 17:21:10,748 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-08 17:21:10,782 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/data/2552d474a/89d0e74ea22a44bcb6426dd7f7862f45/FLAG035e20a45 [2018-12-08 17:21:11,154 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 17:21:11,154 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-08 17:21:11,158 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/data/2552d474a/89d0e74ea22a44bcb6426dd7f7862f45/FLAG035e20a45 [2018-12-08 17:21:11,525 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/data/2552d474a/89d0e74ea22a44bcb6426dd7f7862f45 [2018-12-08 17:21:11,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 17:21:11,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 17:21:11,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 17:21:11,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 17:21:11,531 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 17:21:11,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e0d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11, skipping insertion in model container [2018-12-08 17:21:11,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 17:21:11,548 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 17:21:11,636 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 17:21:11,638 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 17:21:11,646 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 17:21:11,654 INFO L195 MainTranslator]: Completed translation [2018-12-08 17:21:11,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11 WrapperNode [2018-12-08 17:21:11,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 17:21:11,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 17:21:11,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 17:21:11,654 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 17:21:11,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 17:21:11,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 17:21:11,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 17:21:11,666 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 17:21:11,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... [2018-12-08 17:21:11,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 17:21:11,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 17:21:11,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 17:21:11,676 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 17:21:11,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 17:21:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 17:21:11,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 17:21:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 17:21:11,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 17:21:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 17:21:11,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 17:21:11,738 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-08 17:21:11,738 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-08 17:21:11,821 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 17:21:11,821 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 17:21:11,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:21:11 BoogieIcfgContainer [2018-12-08 17:21:11,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 17:21:11,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 17:21:11,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 17:21:11,825 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 17:21:11,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 05:21:11" (1/3) ... [2018-12-08 17:21:11,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37da062b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 05:21:11, skipping insertion in model container [2018-12-08 17:21:11,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:21:11" (2/3) ... [2018-12-08 17:21:11,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37da062b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 05:21:11, skipping insertion in model container [2018-12-08 17:21:11,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:21:11" (3/3) ... [2018-12-08 17:21:11,828 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-12-08 17:21:11,836 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 17:21:11,842 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 17:21:11,856 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 17:21:11,874 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 17:21:11,874 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 17:21:11,874 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 17:21:11,874 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 17:21:11,874 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 17:21:11,874 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 17:21:11,874 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 17:21:11,874 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 17:21:11,874 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 17:21:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-08 17:21:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 17:21:11,888 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:11,889 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:11,890 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:11,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-12-08 17:21:11,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:11,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:11,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:11,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:11,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:21:11,991 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:21:11,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 17:21:11,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 17:21:12,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 17:21:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 17:21:12,007 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-08 17:21:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:12,064 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-08 17:21:12,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 17:21:12,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 17:21:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:12,072 INFO L225 Difference]: With dead ends: 35 [2018-12-08 17:21:12,072 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 17:21:12,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 17:21:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 17:21:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-08 17:21:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 17:21:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-08 17:21:12,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-12-08 17:21:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:12,101 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-08 17:21:12,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 17:21:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-08 17:21:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 17:21:12,102 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:12,102 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:12,103 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:12,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-12-08 17:21:12,103 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:12,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:12,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:12,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:21:12,132 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:21:12,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 17:21:12,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 17:21:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 17:21:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 17:21:12,134 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-12-08 17:21:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:12,169 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-12-08 17:21:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 17:21:12,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-08 17:21:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:12,170 INFO L225 Difference]: With dead ends: 27 [2018-12-08 17:21:12,170 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 17:21:12,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 17:21:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 17:21:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-08 17:21:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 17:21:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-08 17:21:12,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-12-08 17:21:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:12,174 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-08 17:21:12,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 17:21:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-08 17:21:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 17:21:12,175 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:12,175 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:12,175 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:12,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:12,175 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-12-08 17:21:12,176 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:12,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:12,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:12,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 17:21:12,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:12,215 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:12,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 17:21:12,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:12,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-12-08 17:21:12,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 17:21:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 17:21:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:21:12,287 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-12-08 17:21:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:12,347 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-12-08 17:21:12,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 17:21:12,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-12-08 17:21:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:12,348 INFO L225 Difference]: With dead ends: 38 [2018-12-08 17:21:12,348 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 17:21:12,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:21:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 17:21:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-08 17:21:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 17:21:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-08 17:21:12,352 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-12-08 17:21:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:12,352 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-08 17:21:12,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 17:21:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-08 17:21:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-08 17:21:12,353 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:12,353 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:12,353 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:12,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-12-08 17:21:12,353 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:12,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:12,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:12,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-08 17:21:12,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:12,382 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:12,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-08 17:21:12,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:12,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-08 17:21:12,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 17:21:12,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 17:21:12,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 17:21:12,419 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-12-08 17:21:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:12,454 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-12-08 17:21:12,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 17:21:12,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-12-08 17:21:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:12,455 INFO L225 Difference]: With dead ends: 32 [2018-12-08 17:21:12,456 INFO L226 Difference]: Without dead ends: 28 [2018-12-08 17:21:12,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:21:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-08 17:21:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-08 17:21:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-08 17:21:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-12-08 17:21:12,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-12-08 17:21:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:12,460 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-12-08 17:21:12,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 17:21:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-12-08 17:21:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-08 17:21:12,461 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:12,461 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:12,461 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:12,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-12-08 17:21:12,461 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:12,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:12,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:12,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-08 17:21:12,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:12,501 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:12,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 17:21:12,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 17:21:12,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:12,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-08 17:21:12,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:12,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-12-08 17:21:12,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 17:21:12,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 17:21:12,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:21:12,563 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-12-08 17:21:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:12,616 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-12-08 17:21:12,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 17:21:12,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-12-08 17:21:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:12,618 INFO L225 Difference]: With dead ends: 40 [2018-12-08 17:21:12,618 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 17:21:12,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:21:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 17:21:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-12-08 17:21:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 17:21:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-12-08 17:21:12,623 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-12-08 17:21:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:12,624 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-12-08 17:21:12,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 17:21:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-12-08 17:21:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-08 17:21:12,625 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:12,625 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:12,626 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:12,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-12-08 17:21:12,626 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:12,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:12,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:12,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-12-08 17:21:12,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:12,720 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:12,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:21:12,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-08 17:21:12,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:12,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-12-08 17:21:12,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:12,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-12-08 17:21:12,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 17:21:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 17:21:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:21:12,781 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-12-08 17:21:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:12,940 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-12-08 17:21:12,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 17:21:12,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-12-08 17:21:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:12,942 INFO L225 Difference]: With dead ends: 76 [2018-12-08 17:21:12,942 INFO L226 Difference]: Without dead ends: 49 [2018-12-08 17:21:12,943 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-12-08 17:21:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-08 17:21:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-12-08 17:21:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-08 17:21:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-12-08 17:21:12,948 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-12-08 17:21:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:12,949 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-12-08 17:21:12,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 17:21:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-12-08 17:21:12,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-08 17:21:12,950 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:12,950 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:12,950 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:12,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-12-08 17:21:12,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:12,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:12,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:12,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-12-08 17:21:12,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:12,995 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:13,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:21:13,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:21:13,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:13,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-12-08 17:21:13,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:13,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-12-08 17:21:13,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 17:21:13,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 17:21:13,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:21:13,050 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-12-08 17:21:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:13,122 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-12-08 17:21:13,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 17:21:13,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2018-12-08 17:21:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:13,124 INFO L225 Difference]: With dead ends: 52 [2018-12-08 17:21:13,124 INFO L226 Difference]: Without dead ends: 48 [2018-12-08 17:21:13,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:21:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-08 17:21:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-08 17:21:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-08 17:21:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-12-08 17:21:13,131 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 82 [2018-12-08 17:21:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:13,132 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-12-08 17:21:13,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 17:21:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-12-08 17:21:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-08 17:21:13,134 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:13,134 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:13,134 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:13,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1659236261, now seen corresponding path program 5 times [2018-12-08 17:21:13,135 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:13,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:13,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:13,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:13,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 129 proven. 106 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2018-12-08 17:21:13,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:13,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:13,198 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 17:21:13,211 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-08 17:21:13,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:13,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 463 proven. 77 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-12-08 17:21:13,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:13,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2018-12-08 17:21:13,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 17:21:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 17:21:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-12-08 17:21:13,279 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 11 states. [2018-12-08 17:21:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:13,419 INFO L93 Difference]: Finished difference Result 94 states and 162 transitions. [2018-12-08 17:21:13,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 17:21:13,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2018-12-08 17:21:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:13,421 INFO L225 Difference]: With dead ends: 94 [2018-12-08 17:21:13,421 INFO L226 Difference]: Without dead ends: 52 [2018-12-08 17:21:13,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2018-12-08 17:21:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-08 17:21:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-12-08 17:21:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-08 17:21:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2018-12-08 17:21:13,425 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 125 [2018-12-08 17:21:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:13,426 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2018-12-08 17:21:13,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 17:21:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2018-12-08 17:21:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-12-08 17:21:13,427 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:13,427 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:13,427 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:13,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 6 times [2018-12-08 17:21:13,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:13,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:13,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-12-08 17:21:13,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:13,491 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:13,497 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 17:21:13,520 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-12-08 17:21:13,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:13,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-12-08 17:21:13,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:13,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-12-08 17:21:13,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 17:21:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 17:21:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-08 17:21:13,561 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 9 states. [2018-12-08 17:21:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:13,644 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2018-12-08 17:21:13,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 17:21:13,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2018-12-08 17:21:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:13,645 INFO L225 Difference]: With dead ends: 61 [2018-12-08 17:21:13,646 INFO L226 Difference]: Without dead ends: 57 [2018-12-08 17:21:13,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-08 17:21:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-08 17:21:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-08 17:21:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-08 17:21:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2018-12-08 17:21:13,652 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 136 [2018-12-08 17:21:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:13,653 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2018-12-08 17:21:13,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 17:21:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2018-12-08 17:21:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-12-08 17:21:13,655 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:13,655 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:13,655 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:13,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 7 times [2018-12-08 17:21:13,656 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:13,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:13,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:13,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:13,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 669 proven. 122 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-12-08 17:21:13,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:13,789 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:13,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:13,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-12-08 17:21:13,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:13,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2018-12-08 17:21:13,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-08 17:21:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 17:21:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:21:13,912 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 18 states. [2018-12-08 17:21:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:14,299 INFO L93 Difference]: Finished difference Result 142 states and 238 transitions. [2018-12-08 17:21:14,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-08 17:21:14,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 204 [2018-12-08 17:21:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:14,301 INFO L225 Difference]: With dead ends: 142 [2018-12-08 17:21:14,301 INFO L226 Difference]: Without dead ends: 93 [2018-12-08 17:21:14,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 17:21:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-08 17:21:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2018-12-08 17:21:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-08 17:21:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2018-12-08 17:21:14,309 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 204 [2018-12-08 17:21:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:14,309 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2018-12-08 17:21:14,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-08 17:21:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2018-12-08 17:21:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-12-08 17:21:14,311 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:14,311 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:14,312 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:14,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2018-12-08 17:21:14,312 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:14,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:14,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:14,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:14,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 702 proven. 270 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2018-12-08 17:21:14,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:14,403 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:14,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 17:21:14,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 17:21:14,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:14,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2018-12-08 17:21:14,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:14,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2018-12-08 17:21:14,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 17:21:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 17:21:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-08 17:21:14,524 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand 11 states. [2018-12-08 17:21:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:14,612 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2018-12-08 17:21:14,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 17:21:14,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 286 [2018-12-08 17:21:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:14,613 INFO L225 Difference]: With dead ends: 92 [2018-12-08 17:21:14,613 INFO L226 Difference]: Without dead ends: 88 [2018-12-08 17:21:14,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:21:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-08 17:21:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-12-08 17:21:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-08 17:21:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2018-12-08 17:21:14,619 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 286 [2018-12-08 17:21:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:14,619 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2018-12-08 17:21:14,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 17:21:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2018-12-08 17:21:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-08 17:21:14,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:14,621 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:14,621 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:14,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 9 times [2018-12-08 17:21:14,621 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:14,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:14,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:14,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:14,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1412 proven. 592 refuted. 0 times theorem prover too weak. 10383 trivial. 0 not checked. [2018-12-08 17:21:14,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:14,753 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:14,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 17:21:14,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-12-08 17:21:14,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:14,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1415 proven. 256 refuted. 0 times theorem prover too weak. 10716 trivial. 0 not checked. [2018-12-08 17:21:14,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:14,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-12-08 17:21:14,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 17:21:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 17:21:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-08 17:21:14,927 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand 11 states. [2018-12-08 17:21:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:15,025 INFO L93 Difference]: Finished difference Result 95 states and 134 transitions. [2018-12-08 17:21:15,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 17:21:15,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 463 [2018-12-08 17:21:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:15,026 INFO L225 Difference]: With dead ends: 95 [2018-12-08 17:21:15,026 INFO L226 Difference]: Without dead ends: 91 [2018-12-08 17:21:15,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:21:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-08 17:21:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-12-08 17:21:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-08 17:21:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2018-12-08 17:21:15,032 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 463 [2018-12-08 17:21:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:15,033 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2018-12-08 17:21:15,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 17:21:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2018-12-08 17:21:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-12-08 17:21:15,034 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:15,034 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:15,035 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:15,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1932846124, now seen corresponding path program 10 times [2018-12-08 17:21:15,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:15,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:15,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:15,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:15,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 440 proven. 2503 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2018-12-08 17:21:15,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:15,216 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:15,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 17:21:15,282 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 17:21:15,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:15,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 2942 refuted. 0 times theorem prover too weak. 15760 trivial. 0 not checked. [2018-12-08 17:21:15,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:15,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-12-08 17:21:15,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 17:21:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 17:21:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-08 17:21:15,448 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand 12 states. [2018-12-08 17:21:15,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:15,557 INFO L93 Difference]: Finished difference Result 100 states and 151 transitions. [2018-12-08 17:21:15,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 17:21:15,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 572 [2018-12-08 17:21:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:15,559 INFO L225 Difference]: With dead ends: 100 [2018-12-08 17:21:15,559 INFO L226 Difference]: Without dead ends: 96 [2018-12-08 17:21:15,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-08 17:21:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-08 17:21:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-12-08 17:21:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-08 17:21:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 138 transitions. [2018-12-08 17:21:15,565 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 138 transitions. Word has length 572 [2018-12-08 17:21:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:15,566 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 138 transitions. [2018-12-08 17:21:15,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 17:21:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 138 transitions. [2018-12-08 17:21:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2018-12-08 17:21:15,570 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:15,570 INFO L402 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:15,570 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:15,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash -589175644, now seen corresponding path program 11 times [2018-12-08 17:21:15,571 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:15,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:15,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:15,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:15,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 768 proven. 4887 refuted. 0 times theorem prover too weak. 45255 trivial. 0 not checked. [2018-12-08 17:21:15,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:15,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:15,930 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 17:21:16,272 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 112 check-sat command(s) [2018-12-08 17:21:16,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:16,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 5099 proven. 5514 refuted. 0 times theorem prover too weak. 40297 trivial. 0 not checked. [2018-12-08 17:21:16,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:16,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 23 [2018-12-08 17:21:16,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-08 17:21:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-08 17:21:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2018-12-08 17:21:16,614 INFO L87 Difference]: Start difference. First operand 93 states and 138 transitions. Second operand 23 states. [2018-12-08 17:21:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:17,303 INFO L93 Difference]: Finished difference Result 257 states and 561 transitions. [2018-12-08 17:21:17,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-08 17:21:17,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 926 [2018-12-08 17:21:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:17,305 INFO L225 Difference]: With dead ends: 257 [2018-12-08 17:21:17,305 INFO L226 Difference]: Without dead ends: 174 [2018-12-08 17:21:17,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 923 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=687, Invalid=2735, Unknown=0, NotChecked=0, Total=3422 [2018-12-08 17:21:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-12-08 17:21:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2018-12-08 17:21:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-08 17:21:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 212 transitions. [2018-12-08 17:21:17,323 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 212 transitions. Word has length 926 [2018-12-08 17:21:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:17,323 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 212 transitions. [2018-12-08 17:21:17,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-08 17:21:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 212 transitions. [2018-12-08 17:21:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1390 [2018-12-08 17:21:17,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:17,332 INFO L402 BasicCegarLoop]: trace histogram [203, 203, 164, 101, 101, 101, 101, 101, 101, 101, 63, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:17,332 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:17,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:17,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1350010174, now seen corresponding path program 12 times [2018-12-08 17:21:17,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:17,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:17,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:17,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:17,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 6431 proven. 3718 refuted. 0 times theorem prover too weak. 105429 trivial. 0 not checked. [2018-12-08 17:21:18,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:18,004 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:18,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 17:21:18,634 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 146 check-sat command(s) [2018-12-08 17:21:18,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:18,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 9568 proven. 1014 refuted. 0 times theorem prover too weak. 104996 trivial. 0 not checked. [2018-12-08 17:21:19,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:19,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2018-12-08 17:21:19,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-08 17:21:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-08 17:21:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2018-12-08 17:21:19,223 INFO L87 Difference]: Start difference. First operand 142 states and 212 transitions. Second operand 23 states. [2018-12-08 17:21:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:19,713 INFO L93 Difference]: Finished difference Result 332 states and 635 transitions. [2018-12-08 17:21:19,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-08 17:21:19,713 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1389 [2018-12-08 17:21:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:19,715 INFO L225 Difference]: With dead ends: 332 [2018-12-08 17:21:19,716 INFO L226 Difference]: Without dead ends: 175 [2018-12-08 17:21:19,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1437 GetRequests, 1390 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1838, Unknown=0, NotChecked=0, Total=2352 [2018-12-08 17:21:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-12-08 17:21:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2018-12-08 17:21:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-08 17:21:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 192 transitions. [2018-12-08 17:21:19,726 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 192 transitions. Word has length 1389 [2018-12-08 17:21:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:19,727 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 192 transitions. [2018-12-08 17:21:19,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-08 17:21:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 192 transitions. [2018-12-08 17:21:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-12-08 17:21:19,736 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:19,736 INFO L402 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:19,737 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:19,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:19,737 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 13 times [2018-12-08 17:21:19,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:19,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:19,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:19,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 17:21:19,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-08 17:21:21,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:21,259 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:21,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:21,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-08 17:21:22,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:22,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2018-12-08 17:21:22,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-08 17:21:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-08 17:21:22,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 17:21:22,823 INFO L87 Difference]: Start difference. First operand 139 states and 192 transitions. Second operand 40 states. [2018-12-08 17:21:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:23,174 INFO L93 Difference]: Finished difference Result 152 states and 219 transitions. [2018-12-08 17:21:23,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-08 17:21:23,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2018-12-08 17:21:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:23,176 INFO L225 Difference]: With dead ends: 152 [2018-12-08 17:21:23,176 INFO L226 Difference]: Without dead ends: 148 [2018-12-08 17:21:23,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1440 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 17:21:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-08 17:21:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-08 17:21:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-08 17:21:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 199 transitions. [2018-12-08 17:21:23,187 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 199 transitions. Word has length 1212 [2018-12-08 17:21:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:23,188 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 199 transitions. [2018-12-08 17:21:23,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-08 17:21:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 199 transitions. [2018-12-08 17:21:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1676 [2018-12-08 17:21:23,202 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:21:23,202 INFO L402 BasicCegarLoop]: trace histogram [245, 245, 198, 122, 122, 122, 122, 122, 122, 122, 76, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:21:23,202 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:21:23,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:21:23,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1947361163, now seen corresponding path program 14 times [2018-12-08 17:21:23,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 17:21:23,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 17:21:23,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:23,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:21:23,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:21:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:21:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 2138 proven. 11524 refuted. 0 times theorem prover too weak. 154925 trivial. 0 not checked. [2018-12-08 17:21:24,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:21:24,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:21:24,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 17:21:24,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 17:21:24,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 17:21:24,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:21:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 2156 proven. 11497 refuted. 0 times theorem prover too weak. 154934 trivial. 0 not checked. [2018-12-08 17:21:25,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 17:21:25,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2018-12-08 17:21:25,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-08 17:21:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 17:21:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-12-08 17:21:25,127 INFO L87 Difference]: Start difference. First operand 144 states and 199 transitions. Second operand 18 states. [2018-12-08 17:21:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:21:25,279 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2018-12-08 17:21:25,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 17:21:25,279 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1675 [2018-12-08 17:21:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:21:25,280 INFO L225 Difference]: With dead ends: 147 [2018-12-08 17:21:25,280 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 17:21:25,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1708 GetRequests, 1682 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2018-12-08 17:21:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 17:21:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 17:21:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 17:21:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 17:21:25,282 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1675 [2018-12-08 17:21:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:21:25,282 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 17:21:25,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-08 17:21:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 17:21:25,282 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 17:21:25,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 17:21:25,993 WARN L180 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 67 [2018-12-08 17:21:26,139 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 8 [2018-12-08 17:21:26,140 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 17:21:26,140 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 17:21:26,140 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 17:21:26,140 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 17:21:26,140 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 17:21:26,140 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 17:21:26,140 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-12-08 17:21:26,141 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-12-08 17:21:26,141 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-08 17:21:26,142 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (<= fibo_~n |fibo_#in~n|)) (.cse3 (<= 5 fibo_~n))) (let ((.cse0 (and .cse2 (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= |fibo_#in~n| 5) .cse3)) (.cse1 (and (<= |fibo_#t~ret0| 5) (<= |fibo_#in~n| 6) .cse2 (<= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)))) (and (or (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34)) (<= fibo_~n 9) (<= 11 |fibo_#in~n|)) (or .cse0 .cse1 (and (<= 7 |fibo_#in~n|) .cse2) (< |fibo_#in~n| 5)) (< 1 |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (or .cse0 .cse1 (<= 10 |fibo_#in~n|) (and .cse2 (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|)) (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#in~n| 8) (<= 8 |fibo_#in~n|) (<= |fibo_#t~ret0| 13)) (and (<= |fibo_#t~ret0| 21) .cse2 (<= 21 |fibo_#t~ret0|) (<= 9 fibo_~n)) (and (<= 4 |fibo_#in~n|) (<= fibo_~n 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and (<= |fibo_#t~ret0| 8) .cse2 (<= 8 |fibo_#t~ret0|) .cse3 (<= |fibo_#in~n| 7)))))) [2018-12-08 17:21:26,142 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-12-08 17:21:26,142 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-12-08 17:21:26,142 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-12-08 17:21:26,142 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-12-08 17:21:26,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 05:21:26 BoogieIcfgContainer [2018-12-08 17:21:26,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 17:21:26,145 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 17:21:26,145 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 17:21:26,145 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 17:21:26,146 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:21:11" (3/4) ... [2018-12-08 17:21:26,148 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 17:21:26,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 17:21:26,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 17:21:26,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-12-08 17:21:26,156 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 17:21:26,156 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 17:21:26,156 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 17:21:26,181 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_828c8a21-94c9-46c6-8b1b-cebb70bbb589/bin-2019/uautomizer/witness.graphml [2018-12-08 17:21:26,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 17:21:26,182 INFO L168 Benchmark]: Toolchain (without parser) took 14654.56 ms. Allocated memory was 1.0 GB in the beginning and 2.8 GB in the end (delta: 1.8 GB). Free memory was 960.3 MB in the beginning and 1.5 GB in the end (delta: -506.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2018-12-08 17:21:26,182 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:21:26,182 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.80 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 17:21:26,183 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.36 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:21:26,183 INFO L168 Benchmark]: Boogie Preprocessor took 10.05 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:21:26,183 INFO L168 Benchmark]: RCFGBuilder took 145.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -134.9 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2018-12-08 17:21:26,183 INFO L168 Benchmark]: TraceAbstraction took 14322.19 ms. Allocated memory was 1.1 GB in the beginning and 2.8 GB in the end (delta: 1.7 GB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -381.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2018-12-08 17:21:26,184 INFO L168 Benchmark]: Witness Printer took 36.32 ms. Allocated memory is still 2.8 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:21:26,185 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 125.80 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.36 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.05 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 145.77 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -134.9 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14322.19 ms. Allocated memory was 1.1 GB in the beginning and 2.8 GB in the end (delta: 1.7 GB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -381.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. * Witness Printer took 36.32 ms. Allocated memory is still 2.8 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 14.2s OverallTime, 17 OverallIterations, 245 TraceHistogramMax, 3.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 434 SDtfs, 777 SDslu, 2714 SDs, 0 SdLazy, 3859 SolverSat, 959 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7953 GetRequests, 7515 SyntacticMatches, 92 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 99 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 284 PreInvPairs, 486 NumberOfFragments, 193 HoareAnnotationTreeSize, 284 FomulaSimplifications, 2239 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6754 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 14545 NumberOfCodeBlocks, 13915 NumberOfCodeBlocksAsserted, 334 NumberOfCheckSat, 14513 ConstructedInterpolants, 0 QuantifiedInterpolants, 27285335 SizeOfPredicates, 99 NumberOfNonLiveVariables, 14656 ConjunctsInSsa, 908 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 821776/927294 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...